waybar-menu: menu-file path is not expanded

[jlebras]

Hello, new user of waybar there, thank you for your work !

I followed the documentation about waybar menu configuration but somehow was unable to display a menu when clicking (actually waybar segfaults).

After digging the logs, I found that waybar could not find the xml file describing the menu as a GtkBuilder.
The path used was identical to the one from the doc (~/.config/waybar/power_menu.xml), I tried with $HOME and same thing.

The waybar log shows the path "as-is" without path expansion so I guess there is no expansion at all on the string provided.
After providing a full path it worked.

I looked quickly at the code and the file is opened there without any processing of the path from the config.

I don't know if it's a bug or intended behaviour (could be handy though).

[yangyingchao]

I wasn't aware of this feature before, but I would like to use it. Therefore, I have opened a PR for this :)

It does not hurt to expand the filepath anyway.